sringboot项目使用 @Valid进行数据验证失效

dto代码:

    @ApiModelProperty(value="名称")
    @NotBlank(message = "不能为空")
    private String campaignName;

    @ApiModelProperty(value="每日预算")
    @Min(value = 10,message = "每日预算不可以低于10")
    @Max(value = 500000,message = "每日预算最高不超过500000")
    private Float budget;

controller代码:

    @ApiOperation("添加")
    @PostMapping("/addCampaign")
    public R addCampaign(@RequestBody @Valid List<SysWlCampaignTypeDto> sysWlCampaignTypeDto, BindingResult result)
    {
        if (result.hasErrors())
        {
            return new R(result.getFieldError().getDefaultMessage());
        }
        else
        {
            return sysWlCampaignService.addCampaign(sysWlCampaignTypeDto);
        }

    }